সব প্রশ্নে ফিরে যান
Math
A can do 3 piece of work in 4 hours, B and C together in 3 hours , and A and C together in 2 hours. How long will B alone take to do it?
A) 8 hours
B) 12 hours
সঠিক উত্তর
C) s10hours
D) 24 hours